I have a state that I want to open which has an image background and buttons to the side. When a user clicks on one of the buttons I want the video to appear over the graphic. Is there a way to do this?

I also need to have different movies play in that same player based on which button the user clicks on in that state. Is that possible too?

Best way is to have a separate state that's a copy of the first, just with a video player. An alternative is to do something like set the opacity on a button click to take a video player from invisible to visible.

In terms of playing different videos, just have each button set the source property on the video player. On Click > Play Action Sequence > Set Property > Source.